Furnace



A. SMALLWOOD.

FURNACE.

APPLICATION FILED MAR. B. 1920.

1,41:3,22 Patented Jam. W, 1922.

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' FURNACE.

' I APPLICATION FILED MAR. 8. I920. mm mo A. SMALLWOOD.

FURNACE.

APPLlCATlON FILED MAR.8, 1920.

1,4LQ3,2@% v I Patented Jan. W, 1922.

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FURNACE.

APPLICATION FILED MAR-8. I920.

Patented. Jan. W, 1922.

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ALFRED SMALLWOOD, OF HIGHGATE, LONDON, ENGLAND.

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aos-2oz.

Application 'filed March 8, 1920.

To all 7.0]l-0l/b it may concern:

Be it known that I, ALFRED SMALLwooD, a subject f the Kingdom of Great Britain, residing at 42 Hargrave Park, Highgate, London, N, in the county of Middlesex, England, metallurgist, have invented certain new and useful improvements in or lielating to Furnaces, of which the following is a specification.

This invention comprises certain improvements in r relating to furnaces, and while being applicable to furnaces generally, the invention may, for example, be advantageously utilized for annealing of steel castings and production of malleable cast iron, pottery ware, sheet annealing, and the like.

According to the present invention I provide at intervals along the side or each side of the furnace, a series of fiucs or chambers which communicate with the working cham ber. These fines or chambers are adapted to receive gas, oil, vapor, powdered coal, or other appropriate fuel, and in conjunction with each vertical flue or chamber an air admission port is provided whereby air, preferably recuperated, is supplied to the said gas so that the latter may mix and burn in the said fines or chambers, or when issuing therefrom into the working chamher. The supply of gas to the said fines or chambers may be individually regnlable for each fiue or chamber as may also the air supply.

The waste gases advantageously egress from the working chamber by way of a series of ports distributed over the floor. These ports may be arranged in series of longitudinal lines, the ports in the respective lines being staggered transversely of the furnace.

In order that this invention may be clearly understood and readily carried. into practice, reference may be had to the appended five sheets of explanatory drawings, upon which Figure 1 is an end sectional elevation of a furnace according to the present invention.

Figure 2 is a side vertical section of the furnace shown in Figure l, the plane of section being on the line 1-2 of the figure last mentioned.

Figure 3 is a sectional plan of the furnace shown in Figures 1 and 2, the plane of sec tion being on line 3-4 of Figure 1.

Specification of Letters Patent.

Patented Jan. Eli), isee.

Serial No. 364,269.

Figure l is an end sectional elevation of a modified furnace according to the present invention.

Figure 5 is a side sectional elevation of the furnace shown in F ignre 4, the plane of section being on line 5-6 of the figure last mentioned.

In a convenient embodiment of the present invention, and referring to Figures 1, 2 and 3, tw gas producers a located at the extremity of the furnace each communicate with a longitudinal green gas flue Z) running along the side of the furnace, and from the said green gas fine a series of tip-shafts 0 extend at intervals along the side of the furnace and communicate with the upper part of the working chamber (Z. Each upshaft 0 is adapted to be individually regulated as for instance by a damper 6.

At the level below that of the green fiues two recuperator systems are provided. Air enters at f and passes along a series of fines g. These fines communicate with other flues 7:, along which the air flows in the reverse direction. From the fines h the air passes into a flue 2' located below an arch above the recuperator system. From this flue a series of flues y extend at intervals along the length of the furnace and cont municate with the respective up-shafts c. As shown in Figure 2, for this purpose the fines may be diverted laterally at .2, and the laterally diverted parts thereof which communicate with the up-shafts c at Z may be provided with control dampers am. By this arrangement the air and gas are brought together and allowed to mix and ignite before any absorption of heat takes place due to exposure to the goods. By providing for the individual regulation of the air and gas it is possible to obtain oxidizing, reducing, or neutral furnace gases according to the class of work under treatment. It will be noted that the air follows a progressively ascending course, as a result of which its introduction is independent of any draught such as might have to be created by the stack; ingress of cold air as a result of draught suction is on this account eliminated.

Below the fioor of the working chamber and between the latter and the arches of the recuperators are four longitudinal waste gas flues a. Between these and the working chamber the egress fioor ports 0 are provided. lhe method of supporting the wor ing floor by the small arches of the waste. gas flues n enables the said floor to withstand heavy loads, while the waste gases, whilev flowing within the flues a, are enabled'to radiate heat upwardly to the goods. waste gas fiues at one end of the furnace e2;- tend downwardly at p and communicate with longitudinal recuperator fiues Q located intermediately to the air fines of the recuperator, and said waste gases egress to the stack by a transverse flue 1" at the other extremity of the furnace.

Ina modified embodiment of the present invention as shown in Figures at and 5, a single gas producer communicates with one green gas flue s from which up-shafts c X- tend as in the previous embodiment. These lip-shafts are located on one side only of the furnace. The airsupply is similar to that in the previous embodiment, air being admitted to the recuperator flues twhichconr Inunicate with a common flue i from which ports extend upwardly to a common longitudinal flue a. From this flue u a series of ports 41 extend to the up-shafts 0 These ports are individually regulable by dampers Q0. In this embodiment a series of outlets may be provided along the other side of the furnace, these outlets beingindividually regulable by dampers z. The said outlet-s communicate with a waste gas flue Trunning longitudinally of the furnace below the working chamber and between the latter and the single recuperatorsystem. At one extremity this waste gas flue 7 is extended The downwardly and communicates with a transverse fiue 8 which admits to the waste gas recuperator flues 9.

What I claim as my invention and desire tosecure by Letters Patent is 1. A furnace, including" a working chamber, a series of fines, at the side of the furnace and communicating with the working chamber, said flues adapted to receivefuel, air admission ports for each flue, and a series of ports distributed over" the floor ofsaid working chamber'for the egress of waste gases.

' 2. A furnace, including a working chamher, a series of fines at the side of the furnace and communicating with the working chamnace and communicating; with the working chamber, said fines adapted'to receive fuel,

and air admission ports for each flue, series of ports distributed over the floor of said worliin chamber for the e ress of waste vases and a series of individuall Y re 'ulable outlets, provided along the other side of the furnace. I In witness whereof I have hereunto setmy hand. i f

ALFRED SMALLWOOD. 

